In the rich text editor:
@Davidebx
In a comment:
[Davidebx](https://chowlings.com/user/Davidebx)
For Names and Avatars:
In the rich text editor:
%Davidebx
In a comment:
[![Davidebx's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Davidebx) [Davidebx](https://chowlings.com/user/Davidebx)